Electric fan

Abstract

The electric fan provided by the present disclosure belongs to the technical field of electric fans. The electric fan comprises, from bottom to top, a bottom plate, a supporting rod and a connecting rod. The top end of the connecting rod is rotationally provided with a support. The top end of the support is rotationally provided with a fan head. A left-right rotation assembly is arranged between the connecting rod and the support. An up-down swing assembly is arranged in the fan head. The left-right rotation assembly is used to drive the fan head to swing in the horizontal direction. The up-down swing assembly is used to drive the fan head to swing in the vertical direction. The electric fan realizes the 3D swing blowing function of the fan head, improves the air supply range of the electric fan and improves the cooling effect of the electric fan.

Description

Technical Field

[0001] This disclosure relates to the field of electric fan technology, and more particularly to an electric fan. Background Technology

[0002] An electric fan is a household appliance that uses an electric motor to drive the fan blades to rotate, thereby accelerating the circulation of air. It is mainly used for cooling and ventilating the air and is widely used in homes, classrooms, offices, shops, hospitals, hotels and other places.

[0003] Currently, the structure of electric fans on the market is relatively simple. Most of them only realize the function of automatic left and right oscillation, but cannot realize vertical pitching, which limits the air delivery area of ​​the electric fan and results in unsatisfactory cooling effect.

[0004] To solve the above problems, an electric fan was designed. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an electric fan that realizes the 3D oscillation blowing function of the fan head, improves the air delivery range of the electric fan, and improves the cooling effect of the electric fan.

[0006] To achieve the aforementioned objectives of this utility model, the present disclosure adopts the following technical solution:

[0007] An electric fan includes a chassis, a support rod, and a connecting rod arranged sequentially from bottom to top. A bracket is rotatably mounted on the top of the connecting rod, and a fan head is rotatably mounted on the top of the bracket. A left-right rotating component is provided between the connecting rod and the bracket, and an up-down swinging component is provided inside the fan head.

[0008] The left-right rotation component is used to drive the fan head to swing horizontally, and the up-down swing component is used to drive the fan head to swing vertically.

[0009] In one exemplary embodiment of this disclosure, the support includes an arc-shaped frame and a connecting column;

[0010] The arc-shaped frame has an upward-facing opening, and the fan head is rotatably installed inside the opening.

[0011] The connecting column is disposed at the bottom end of the arc-shaped frame, and the connecting column is rotatably connected to the connecting rod;

[0012] The top end of the connecting rod extends into the connecting post.

[0013] In one exemplary embodiment of this disclosure, the left-right rotation component includes:

[0014] A first motor is disposed inside the connecting column, and a first gear is connected to the output end of the first motor.

[0015] An incomplete internal gear is located at the top of the connecting rod, and the first gear meshes with the incomplete internal gear.

[0016] The first motor is capable of driving the first gear to rotate in both directions.

[0017] In an exemplary embodiment of this disclosure, a first limiting block is provided on both sides of the teeth of the incomplete internal gear, and the first limiting block is disposed on the circumferential inner wall of the incomplete internal gear.

[0018] In one exemplary embodiment of this disclosure, the fan head includes a head and a fan mounted on the head;

[0019] The machine head is located inside the bracket, and the machine head is rotatably mounted on the bracket via a rotating shaft;

[0020] The up-and-down swing assembly is located inside the machine head, and the up-and-down swing assembly can drive the machine head to swing vertically around the rotating shaft.

[0021] In one exemplary embodiment of this disclosure, a transmission box is provided inside the machine head, a U-shaped plate is detachably provided inside the transmission box, and the up-and-down swing assembly is detachably provided on the inner wall of one side of the U-shaped plate;

[0022] The rotating shaft is fixedly mounted on the bracket. One of the two rotating shafts extends into the U-shaped plate and is rotatably connected to the up-and-down swing assembly. The other of the two rotating shafts extends into the U-shaped plate and is rotatably connected to the U-shaped plate.

[0023] In one exemplary embodiment of this disclosure, the up-and-down swing component includes:

[0024] The gearbox is detachably mounted on the inner wall of one side of the U-shaped plate;

[0025] The second motor is located on the inner wall of one side of the gearbox;

[0026] The second gear is connected to the output end of the second motor;

[0027] An incomplete gear is rotatably mounted on the inner wall of the gearbox on the side away from the rotating shaft. The incomplete gear is fixedly connected to the rotating shaft and meshes with the second gear.

[0028] The second motor can drive the second gear to rotate in both directions.

[0029] In one exemplary embodiment of this disclosure, the up-and-down swing component further includes:

[0030] A sleeve is disposed on the inner wall of the gearbox near the rotating shaft, and the sleeve is rotatably connected to the incomplete gear;

[0031] A torsion spring is sleeved on the sleeve. One end of the torsion spring is engaged with the incomplete gear, and the other end of the torsion spring extends out of the U-shaped plate and is engaged with the inner wall of the transmission box.

[0032] In one exemplary embodiment of this disclosure, a plurality of slots are provided at intervals on the outer wall of the incomplete gear, and one end of the torsion spring can be engaged in the slots.

[0033] In one exemplary embodiment of this disclosure, the second gear is rotatably connected to the inner wall of the other side of the gearbox.

[0034] The beneficial effects of this disclosure are:

[0035] This disclosure provides an electric fan that achieves left-right oscillation of the fan head through a left-right rotating component and up-down oscillation of the fan head through a right-down oscillation component, thereby realizing the 3D oscillation blowing function of the fan head, increasing the air delivery range of the electric fan, improving the cooling effect of the electric fan, making the electric fan more convenient to use, and having a wider range of applications. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 This is a schematic diagram of an electric fan in one embodiment of the present disclosure;

[0038] Figure 2 This is a front view of an electric fan according to one embodiment of the present disclosure;

[0039] Figure 3 A cross-sectional view of an electric fan according to one embodiment of this disclosure. Figure 1 ;

[0040] Figure 4 In one embodiment of this disclosure, Figure 3 Enlarged view of point A in the image;

[0041] Figure 5 A cross-sectional view of an electric fan according to one embodiment of this disclosure. Figure 2 ;

[0042] Figure 6 In one embodiment of this disclosure, Figure 5 Enlarged view of point B in the image;

[0043] Figure 7 This is a schematic diagram of the meshing of the first gear and the incomplete internal gear in one embodiment of the present disclosure;

[0044] Figure 8 This is a schematic diagram of an incomplete gear in one embodiment of the present disclosure.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Chassis; 2. Support rod; 3. Connecting rod; 4. Bracket; 5. Fan head; 6. Arc frame; 7. Connecting column; 8. First motor; 9. First gear; 10. Incomplete internal gear; 11. First limit block; 12. Machine head; 13. Fan; 14. Rotating shaft; 15. Transmission box; 16. U-shaped plate; 17. Gearbox; 18. Second motor; 19. Second gear; 20. Incomplete gear; 21. Sleeve; 22. Torsion spring; 23. Slot. Detailed Implementation

[0047] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0048] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0049] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0050] This disclosure provides an electric fan, see [link to relevant documentation] Figures 1 to 3 The device includes a chassis 1, a support rod 2, and a connecting rod 3 arranged sequentially from bottom to top. A bracket 4 is rotatably mounted on the top of the connecting rod 3, and a fan head 5 is rotatably mounted on the top of the bracket 4. A left-right rotating assembly is arranged between the connecting rod 3 and the bracket 4, and a right-right swinging assembly is arranged inside the fan head 5. The left-right rotating assembly is used to drive the fan head 5 to swing horizontally, and the right-right swinging assembly is used to drive the fan head 5 to swing vertically.

[0051] In this embodiment, the electric fan comprises a chassis 1, a support rod 2, a connecting rod 3, a bracket 4, and a fan head 5. The chassis 1, support rod 2, connecting rod 3, and bracket 4 are arranged sequentially from bottom to top. The bracket 4 is rotatably mounted on the top of the connecting rod 3, and the fan head 5 is rotatably mounted on the bracket 4. A left-right rotating assembly is installed between the connecting rod 3 and the bracket 4, and a right-right oscillating assembly is installed inside the fan head 5. The left-right rotating assembly drives the fan head 5 to oscillate horizontally, and the right-right oscillating assembly drives the fan head 5 to oscillate vertically. Through the coordinated operation of the left-right rotating assembly and the right-right oscillating assembly, the electric fan can achieve multi-angle oscillation and air blowing.

[0052] Compared to existing electric fans, this electric fan achieves left-right oscillation of the fan head through a left-right rotating component and up-down oscillation of the fan head through a right-down oscillation component, thereby realizing the 3D oscillation blowing function of the fan head, increasing the air delivery range of the electric fan, improving the cooling effect of the electric fan, making the electric fan more convenient to use and applicable to a wider range.

[0053] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 The bracket 4 includes an arc-shaped frame 6 and a connecting column 7. The arc-shaped frame 6 has an upward-facing opening, and the fan head 5 is rotatably installed inside the opening. The connecting column 7 is located at the bottom of the arc-shaped frame 6 and is rotatably connected to the connecting rod 3. The top end of the connecting rod 3 extends into the connecting column 7. This facilitates the connection between the bracket 4 and the fan head 5, the connection between the bracket 4 and the connecting rod 3, and the rotation of the bracket 4 and the fan head 5, enabling the fan head 5 to oscillate and blow air.

[0054] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 3 , Figure 4 and Figure 7The left-right rotation component includes: a first motor 8, located inside the connecting column 7, with a first gear 9 connected to the output end of the first motor 8; and an incomplete internal gear 10, located at the top of the connecting rod 3, with the first gear 9 and the incomplete internal gear 10 meshing with each other; wherein, the first motor 8 can drive the first gear 9 to rotate in both directions. In this way, the fan head 5 can swing left and right in the horizontal direction.

[0055] Optionally, the first motor 8 is an eccentric motor.

[0056] Optionally, a locking block is provided on one side of the outer wall of the first motor 8, and the first motor 8 is locked in the connecting column 7 by the locking block.

[0057] Optionally, the first motor 8 is connected to the connecting post 7 by screws.

[0058] In the above embodiment, the meshing transmission between the first gear 9 and the incomplete internal gear 10 enables the first gear 9 to rotate around the center of the incomplete internal gear 10, thereby driving the first motor 8 to rotate around the center of the incomplete internal gear 10, and the first motor 8 drives the connecting column 7 to rotate.

[0059] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 7 The incomplete internal gear 10 has a first limiting block 11 on each side of its teeth, and the first limiting block 11 is located on the circumferential inner wall of the incomplete internal gear 10. In this way, the amplitude of the left and right swing of the fan head 5 can be limited, which facilitates the use of the electric fan.

[0060] Understandably, when the fan head 5 needs to swing horizontally, the first motor 8 is started, driving the first gear 9 to rotate. Through the meshing transmission between the first gear 9 and the incomplete internal gear 10, the first gear 9 moves along the teeth of the incomplete internal gear 10. That is, the first gear 9 rotates on its own axis while revolving around the center of the incomplete internal gear 10, thereby driving the first motor 8 to revolve around the center of the incomplete internal gear 10, and thus driving the bracket 4 and the fan head 5 to rotate. When the first gear 9 rotates to the first limit block 11 on one side, the first motor 8 reverses, causing the first gear 9 to move in the opposite direction, thereby driving the bracket 4 and the fan head 5 to rotate in the opposite direction. When the first gear 9 rotates to the first limit block 11 on the other side, the first motor 8 reverses again. This cycle repeats, thereby realizing the left and right swing of the bracket 4 and the fan head 5.

[0061] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 , Figure 3 , Figure 5 and Figure 6The fan head 5 includes a head 12 and a fan 13 mounted on the head 12. The head 12 is located inside the bracket 4 and is rotatably mounted on the bracket 4 via a pivot 14. A vertical swing assembly is located inside the head 12 and can drive the head 12 to swing vertically around the pivot 14. This facilitates the connection between the fan head 5 and the bracket 4, and allows the fan head 5 to swing vertically, avoiding interference between the left-right swing and vertical swing of the fan head 5.

[0062] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 6 The machine head 12 is equipped with a transmission box 15, and a U-shaped plate 16 is detachably installed inside the transmission box 15. The up-and-down swing assembly is detachably installed on the inner wall of one side of the U-shaped plate 16. A rotating shaft 14 is fixedly installed on the bracket 4. One of the two rotating shafts 14 extends into the U-shaped plate 16 and is rotatably connected to the up-and-down swing assembly. The other rotating shaft 14 extends into the U-shaped plate 16 and is rotatably connected to it. This allows for quick assembly of the machine head 12, facilitating its rotatable installation on the bracket 4.

[0063] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 6 The vertical oscillation assembly includes: a gearbox 17, detachably mounted on the inner wall of one side of the U-shaped plate 16; a second motor 18, mounted on the inner wall of one side of the gearbox 17; a second gear 19, connected to the output end of the second motor 18; and an incomplete gear 20, rotatably mounted on the inner wall of the gearbox 17 away from the rotating shaft 14, with the incomplete gear 20 fixedly connected to the rotating shaft 14 and meshing with the second gear 19; wherein the second motor 18 can drive the second gear 19 to rotate in both directions. In this way, the fan head 5 can oscillate vertically.

[0064] Optionally, a second limiting block is provided on both sides of the teeth of the incomplete gear 20, and the second limiting block is provided on the circumferential outer wall of the incomplete gear 20.

[0065] In the above embodiment, one end of the rotating shaft 14 is fixedly connected to the arc frame 6 by screws, and the other end of one rotating shaft 14 extends into the gearbox 17. The rotating shaft 14 is fixedly connected to the incomplete gear 20 by bolts. The rotating shaft 14 is rotatably connected to the machine head 12, the transmission box 15, the U-shaped plate 16 and the gearbox 17 respectively. The other end of the rotating shaft 14 extends into the U-shaped plate 16 and is fixedly connected to the swing bearing by bolts. The U-shaped plate 16 is rotatably connected to the rotating shaft 14 and the swing bearing respectively, and the rotating shaft 14 is rotatably connected to the machine head 12 and the transmission box 15 respectively.

[0066] Understandably, when the fan head 5 needs to oscillate vertically, the second motor 18 is activated, driving the second gear 19 to rotate. Through the meshing transmission between the second gear 19 and the incomplete gear 20, the second gear 19 rotates on its own axis while also revolving around the center of the incomplete gear 20, driving the second motor 18 to rotate around the shaft 14. This, in turn, drives the gearbox 17, the U-shaped plate 16, and the fan head 12 to rotate around the shaft 14, causing the fan head 5 to rotate around the shaft 14. When the second gear 19 rotates to the second limit block on one side, the second motor 18 reverses, causing the second gear 19 to move in the opposite direction, thereby driving the fan head 5 to rotate in the opposite direction around the shaft 14. When the second gear 19 rotates to the second limit block on the other side, the second motor 18 reverses again. This cycle repeats, thus achieving the up-and-down oscillation of the fan head 5.

[0067] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 6 The up-and-down swing assembly also includes: a sleeve 21, located on the inner wall of the gearbox 17 near the rotating shaft 14, which is rotatably connected to the incomplete gear 20; and a torsion spring 22, sleeved on the sleeve 21, with one end of the torsion spring 22 engaging with the incomplete gear 20 and the other end extending out to form a U-shaped plate 16, which engages with the inner wall of the transmission box 15. This provides auxiliary power for the up-and-down swing of the fan head 5, facilitating the second motor 18 to drive the fan head 5 to swing up and down, thus improving the airflow effect of the fan head 5.

[0068] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 8 The outer wall of the incomplete gear 20 is provided with multiple slots 23 at intervals, and one end of the torsion spring 22 can be engaged in the slot 23. In this way, the torque of the torsion spring 22 can be adjusted to adapt to fan heads 5 of different weights, so as to achieve smooth up and down swing of the fan head 5.

[0069] Optionally, the teeth of the slot 23 and the incomplete gear 20 are misaligned.

[0070] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 6 The second gear 19 is rotatably connected to the inner wall of the other side of the gearbox 17. This improves the assembly accuracy of the second gear 19, enhances the stability of its installation, and facilitates meshing between the second gear 19 and the incomplete gear 20.

[0071] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 3 One end of the support rod 2 is threaded to the base 1, and the other end of the support rod 2 is threaded to the connecting rod 3. This allows for quick assembly of the electric fan and makes it convenient to use.

[0072] Optionally, the support rod 2 includes multiple support rods, which are connected sequentially by threads. This allows for quick adjustment of the fan's height, facilitating its use.

[0073] In one embodiment of this disclosure, the electric fan further includes a control system, which includes a processor and a PLC controller. The processor is electrically connected to the PLC controller, and the PLC controller is electrically connected to the first motor 8 and the second motor 18, respectively. The PLC controller is pre-written with a control program to enable the electric fan to generate different operating states.

[0074] It is understandable that the PLC controller can control the first motor 8 and the second motor 18 to rotate intermittently in both directions, and the PLC controller can control the first motor 8 and the second motor 18 to run simultaneously, or it can control one of the motors to run independently.

[0075] Optionally, both the first limit block 11 and the second limit block are equipped with position sensors, which are electrically connected to the processor.

[0076] In one embodiment of this disclosure, see Figures 1 to 8 The working process of this electric fan is briefly described as follows:

[0077] In use, this invention involves starting an electric fan to allow fan 13 to blow air; then starting a first motor 8, which drives a first gear 9 to rotate. Through the meshing transmission between the first gear 9 and the incomplete internal gear 10, the first gear 9 rotates around the center of the incomplete internal gear 10, causing the first motor 8 to rotate around the center of the incomplete internal gear 10, and thus the fan head 5 to rotate around the center of the incomplete internal gear 10. The first motor 8 rotates intermittently in both directions, causing the fan head 5 to oscillate horizontally. Then, starting a second motor 18 drives a second gear 19 to rotate, through the meshing transmission between the second gear 19 and... The meshing transmission between the incomplete gears 20 causes the second gear 19 to rotate around the center of the incomplete gear 20, driving the second motor 18 to rotate around the shaft 14, which in turn drives the fan head 5 to rotate around the shaft 14. The second motor 18 rotates intermittently in both directions, enabling the fan head 5 to swing up and down in the vertical direction. The coordinated operation of the first motor 8 and the second motor 18 enables the fan head 5 to swing simultaneously in the horizontal and vertical directions, resulting in a 3D swing motion trajectory of the fan head 5 with an "X" shape, thereby realizing the 3D swing blowing function of the fan head 5 and improving the air delivery range of the electric fan.

[0078] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. An electric fan, comprising a base (1), a support rod (2), and a connecting rod (3) arranged sequentially from bottom to top, characterized in that, The top of the connecting rod (3) is rotatably provided with a bracket (4), the top of the bracket (4) is rotatably provided with a fan head (5), a left-right rotating component is provided between the connecting rod (3) and the bracket (4), and an up-down swinging component is provided inside the fan head (5); The left-right rotation component is used to drive the fan head (5) to swing horizontally, and the up-down swing component is used to drive the fan head (5) to swing vertically.

2. The electric fan according to claim 1, characterized in that, The support (4) includes an arc-shaped frame (6) and a connecting column (7); The arc-shaped frame (6) is set with its opening facing upwards, and the fan head (5) is rotatably installed in the opening; The connecting column (7) is located at the bottom end of the arc frame (6), and the connecting column (7) is rotatably connected to the connecting rod (3); The top end of the connecting rod (3) extends into the connecting post (7).

3. The electric fan according to claim 2, characterized in that, The left and right rotation component includes: A first motor (8) is located inside the connecting column (7), and the output end of the first motor (8) is connected to a first gear (9); An incomplete internal gear (10) is provided at the top of the connecting rod (3), and the first gear (9) meshes with the incomplete internal gear (10); The first motor (8) can drive the first gear (9) to rotate in both directions.

4. The electric fan according to claim 3, characterized in that, The incomplete internal gear (10) has a first limiting block (11) on each side of the teeth, and the first limiting block (11) is disposed on the circumferential inner wall of the incomplete internal gear (10).

5. The electric fan according to claim 1, characterized in that, The fan head (5) includes a head (12) and a fan (13) mounted on the head (12); The machine head (12) is located inside the bracket (4), and the machine head (12) is rotatably mounted on the bracket (4) via a rotating shaft (14); The up-and-down swing assembly is located inside the machine head (12), and the up-and-down swing assembly can drive the machine head (12) to swing vertically around the rotating shaft (14).

6. The electric fan according to claim 5, characterized in that, The machine head (12) is provided with a transmission box (15), and a U-shaped plate (16) is detachably provided in the transmission box (15). The up-and-down swing assembly is detachably provided on the inner wall of one side of the U-shaped plate (16). The rotating shaft (14) is fixedly mounted on the bracket (4). One of the two rotating shafts (14) extends into the U-shaped plate (16) and is rotatably connected to the up-and-down swing assembly. The other of the two rotating shafts (14) extends into the U-shaped plate (16) and is rotatably connected to the U-shaped plate (16).

7. The electric fan according to claim 6, characterized in that, The up-and-down swing component includes: The gearbox (17) is detachably mounted on the inner wall of one side of the U-shaped plate (16); The second motor (18) is located on the inner wall of one side of the gearbox (17); The second gear (19) is connected to the output end of the second motor (18); An incomplete gear (20) is rotatably mounted on the inner wall of the gearbox (17) on the side away from the rotating shaft (14). The incomplete gear (20) is fixedly connected to the rotating shaft (14), and the incomplete gear (20) meshes with the second gear (19). The second motor (18) can drive the second gear (19) to rotate in both directions.

8. The electric fan according to claim 7, characterized in that, The up-and-down swing component also includes: A sleeve (21) is provided on the inner wall of the gearbox (17) near the rotating shaft (14), and the sleeve (21) is rotatably connected to the incomplete gear (20); A torsion spring (22) is sleeved on the sleeve (21). One end of the torsion spring (22) is engaged with the incomplete gear (20), and the other end of the torsion spring (22) extends out of the U-shaped plate (16) and is engaged with the inner wall of the transmission box (15).

9. The electric fan according to claim 8, characterized in that, The outer wall of the incomplete gear (20) is provided with a plurality of slots (23) spaced apart, and one end of the torsion spring (22) can be engaged in the slots (23).

10. The electric fan according to claim 7, characterized in that, The second gear (19) is rotatably connected to the inner wall of the other side of the gearbox (17).

Images